Ions are atoms or groups of atoms with positive or negative electrical charges. The charges of some ions are given. Use this information to find the total charge. 
4 calcium ions and 2 oxalate ions
A. +4
B. -4
C. -12
D. +12
Answer: A
Mathematics
You might also like to view...
Solve the problem.The figure shown here shows a rectangle inscribed in an isosceles right triangle whose hypotenuse is 6 units long. Express the area A of the rectangle in terms of x.
A. A(x) = 2x2 B. A(x) = 2x(3 - x) C. A(x) = 2x(x - 3) D. A(x) = x(3 - x)
Mathematics
Find the derivative.f(x) = 
A. 
+ 
B. 
- 
C. 
- 
D. x3/2 + 9
Mathematics
Test the vector field F to determine if it is conservative.F = -csc2 x csc yi - cot x cot y csc yj - cos xk
A. Not conservative B. Conservative
Mathematics
Graph the function.f(x) = |x + 2|
A. 
B. 
C. 
D. 
Mathematics